Arrow Lake idk, my brain is broken

Stag might have had a moment of regret, however brief, as his sister cried out from under him. He hadn't meant to hurt her like that, to knock her down so thoroughly -- it showed in the unpleasant surprise of his gaze, the way he almost seemed to pull back -- but then she kicked him. 

All the air went out from him immediately; a whoosh of breath, a flare of hot pain snaking, incapacitating --

Stag yelped, a hoarse and horrid noise more like the soft grunt of a foe mortally wounded than the cry of a fleeing victim; sinking to the ground with gasps his vision swam, with tears and pain blinding him.